November 11, 2017 | ProgressTH Orbital shakers are used to agitate substances in closed vessels such as jars, test tubes, and enclosed bioreactors. Our design utilizes 608zz bearings (x6), a 12v stepper motor and driver, a potentiometer, and an...
July 20, 2019 | ProgressTH Version 2 of our magnetic stirrer is now on Thingiverse. It is a completely new design, using a 12V DC motor with a cheap motor speed controller, a 13mmx2.5mm neodymium (x6) rotor and a much larger, sturdier platform...
(Original post date: 14/02/16)Since my log a couple of weeks back where I highlighted the design for my audio synthesis engine I've been hard at work attempting to implement it using the C++ audio synthesis library Maximilian. I'm now...
I decided that interface between ZIF-socket and host machine will be implemented with help of this antique ISA backplane manufactured in 1984 (I bought it for about $20 last month):I cut out it a little to remove part with pull-up resistors, because...
Remapping the KeyboardGiven most of the work is done with the "basic shift logic" how hard could it be?The basic shift logic:Well much harder than expected, here is the schematic:Now many will recognise this as a PLA (Programmable Logic Array).Designing...
Report descriptor (packet) structureByte.BitFunctionDescription0.7X7analog value X LSB0.6X60.5X50.4X40.3X30.2X20.1X10X01.7Y5analog value Y LSB1.6Y41.5Y31.4Y21.3Y11.2Y01.1X9analog value X MSB1X82[4:7]H[1:4]hatswitch buttons2.3Y9analog value Y MSB2.2Y82.1Y72Y63[0:7]Rzanalog...
8th week :CodingThat week, we tried to make them turn one after the other but with a delay between each turn. We had an issue with the fonction "delay" which didn't work alone. Finally, we put it in a condition "if" and suddenly it worked.BoxToday we...
After putting the valve and various PVC fittings together I noticed that the sprinkler bar was well below the wheel well. After measuring, I determined that the bin and plumbing assembly had to be lifted about 6 inches. I didn't want to add that much...
I managed to find 2 rear DLP projection TVs with mirrors in the back of them. When running calculations for surface area of the mirrors needed, I came up short, these 2 extra mirrors should help out. Besides there is a bit of a learning curve for cutting...
Here is what I have been able to piece together of the J1 system bus. AD0-7 and A8-A15 are the multiplexed address and data pins. You can address 64k max directly through the system bus. RD, WR, ALE, IO/M, NMI, IRQ are z80 style pins but there...
We've talked about how DC Injection will play a large role in this product but we haven't yet talked about how we'll actually make that DC. We're all used to thinking about a DC Power Supply as a trivial purchase or design, but this is something altogether...
A market survey revealed that there are many kits available for discrete, thru-hole LED cubes in x4, x6, and x8 sizes. There aren't many kits for cubes larger than that. Most of these kits are inexpensive and include a pig-pile of thru-hole LEDs and...
People tend to view goals as admirable things to strive towards. An engineer tends to view these as constraints that begin to define the design. After looking at YouTube videos of various cube sizes I decided to design an 8x8x8 cube. If designed properly...
Earlier I mocked out some arms to be used with Dynamic Actuators which are about 4" in diameter. There are 2 problems with the arms. Firstly the torso with 4 actuators is a little heavy for dynamic actuators. Secondly, the arms look a little husky. Recently...
I replaced most of the logic board with an Arduino Nano. The only original parts used on the original board is the 12V→240V DC-DC converter, and traces feeding the 5V power through the board. After connecting I checked that shifting values into the anode...